Effect of acute temperature stress on metabolic enzymes, ion enzymes and concentration of ion in serum of juvenile Pampus argenteus

To investigate the effect of acute temperature stress on biochemical indicators of juvenile Pampus argenteus, we designed two treatment groups (22 ℃ and 32 ℃) and a control group (27 ℃) with stress time of 42 h. The GPT in serum and GOT in liver in two experimental groups changed oppositely; AKP varied in an opposite manner but ACP changed in the same way; LDH in 22 ℃ group changed in a wave-like manner (P < 0.05).Na⁺, K⁺, Cl^- and Ca^{2 +} concentrations in three groups changed differently. The Na⁺/K⁺-ATPase activity in gill in 32 ℃ group decreased, but that in kidney in 22 ℃ group increased first then decreased (P < 0.05).In two experimental groups, Ca²⁺/Mg²⁺-ATPase activities in gill and kidney varied in oppositely (P < 0.05). It is suggested that acute temperature stress, which should be avoided in breeding for juvenile P.argenteus, affects normal metabolism of the juveniles significantly.